Reek 2007 Angewandt Pd/Zn salen

Interesting article by Reek. The sole palladium precatalyst lead to inactive run, while combining it with Zn salen result in productive systems. The change of subsituent of the Zn salen induces different activity and diffeernent molecular weight didtribution. It seems obvious that the steric environment of the pd center would be affected by such bulky groups and that the electronic propertioes of the Pd would also be affected.